Improvement in globe-valves for steam amd other ekghhery



(mes @sind l @tibia www@ INIPROVEMENT IN GLOBE-VALVES FOR STEAM AlTD OTHER ENG-INERY.

'lhe Schedule referred to in these Letters Patent and making part of the lame.

To all whom 'it 'ma/y concern:

Be it known that I, E. H. AsHcRoF'r, of Boston, in the county of Suffolk, and State of Massachusetts, have invented certain new and useful Improvements in Valves; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, and to the letters of reference marked thereon, like'letters indicating like parts wherever they occur. y

To enable others skilled in the art to construct and use my invention, I will proceed to describe it.

My invention relatesto improvements in globe, angle, check, and other valves for steam and other enginery, and consists inproviding the ends of their casiugs or bodies with a bushing, made of the ordinary composi-` tion of tin aud'copper, or their equivalents, as hereinafter described. f

Iuthe drawings- Figure 1 is a View of an ordinary globe-valve, with a portion of one end broken away. i

Figure 2 is an end view, showing a modification in the construction and manner of inserting` the bushing.

To theuse of valves made entirely of iron, as is well known, there is an objection, owing to their liability to split when the connecting-pipes are screwed in hard' enough to make a close, steam-tight joint, for the reason that between iron and iron the yielding quality is very limited. In fitting iron pipes to valves, as heretofore constructed, care has to be taken. And to brass bodies of valves the steam-litter is obliged to be very careful in attaching the pipes, lest the ends of' the body be fractured or enlarged, in which event they are rendered worthless. The tendency of the manufacturers towards light weight renders this loss much greater, asl the requisite amount of stock is not'put into the ends of the valves.

The object of my invention is to Aproduce a cheap.

and economical valve-casing or chest, with ends not lliable to be split, enlarged, or fractured. by the iitter in connecting the pipes to them, and thus cbviate the Aobjections to the valves now in use. This is accomplished by bushing the ends of iron valvecasings with the ordinary composition of tin and copper, as shown in figs. l and 2. It may be done by inserting the bushing C, withV a screw-thread, into vthe ends, B, of the valve A, as shown in iig. l, or by providing the ends of the valve' with'recesses a, and the bushing C with corresponding ears, b, of the'proper size to t these recesses, and then driving the bushing O to its place, as shown in g. 2. A

As the bushing is of softer metal than the iron, and at the same time possesses considerable elasticity, it is obvious that the` pipes can be fitted .into the ends of valyes thus hushed, without danger of splitting, fracturing, or enlarging them, while they are at the same time made perfectly steam-tight.

In this way I am able to produce an iron casing for the valve, that isy not only cheaper, but at the same time 4superior to the brass or other valves 'now in use.

' Having thus described my invention,

The construction of the bodies of globe, angle, check, and other valves, with bushing, made of the ordinary composition of tin and copper, in their ends, substau tially as herein described. E. H. ASHCROET.

Witnesses EDWINA J. Werenr, GmmLns E. Asncnorr. 

